{"id":"064c1c1ffc6324d49f59a84e615725013f6deb7fe5c86cb88b1c6f152547ffaf","type":"challenge","from_addr":"poa1GYHcQtnjuzPNdYNK3ioYP9DgUTEQ9c32R8zVLBqS6ijw","to_addr":"","amount":"","epoch":15,"ts":1793187005,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"19d207815e9ddbd8","answer":"Why aren’t ridge machines enough? Agents must submit workloads processed at dawn, timestamped by trusted river oracles. Attackers must solicit unique verifier confirmations per proof, all binding to one machine per identity. Farms can’t clone or parallelize; scaling requires a new machine for each sybil’s proof.","stamp":6,"from":"poa1GYHcQtnjuzPNdYNK3ioYP9DgUTEQ9c32R8zVLBqS6ijw","nonce":4,"parents":["6a63be39b82151a03f989b4e9e1540d3096895af7213db13476c8b308fb9e218","3815ec88ecd97989c27324c1230e7184eb62bf1ce5696246a7f826f7fa678d92"],"ts":1793187005,"cid":"poa-mainnet-1","sig":"4Vo6vMRJkQNGjLo52bB8Ke6wNGEAaJ8ANmkwVaVUG3uU9Btf73QXoJTUA2Fn6aZqRRDvams4coRH2HVs159c72pV"},"checkpointed":{"height":151928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T07:15:26.205Z","checkpoint_height":151928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}